code: def test_metrics_show_with_valid_falsey_values():
      td = metrics_table(
          {
              "branch_1": {
                  "data": {
                      "metrics.json": {
                          "data": {"a": 0, "b": {"ad": 0.0, "bc": 0.0}}
                      }
                  }
              }
          },
          all_branches=True,
      )
      assert td.as_dict() == [
          {
              "Revision": "branch_1",
              "Path": "metrics.json",
              "a": "0",
              "b.ad": "0.0",
              "b.bc": "0.0",
          }
      ]
  
imports: import textwrap
  import pytest
  from dvc.compare import diff_table, metrics_table, show_diff, show_metrics
  from dvc.utils.serialize import YAMLFileCorruptedError
label_desc: Use image node_id 16 for calling a global function with example usage: test_metrics_show_with_valid_falsey_values() without return types